I agree, when we say culture people think about the superficial things, something that can be seen.
The concept of cultural iceberg is floating around since we are not moving into a global ecosystem and it's something I've been reading quite a bit too. I asked myself a question "Do I still have my native culture in me or am I already a part of a global ecosystem where all culture is merged and creates a new one? ". When I mentioned about marriage for example, though there are different expectations because it was a custom, these days gender role in marriage almost everywhere required both, wife and husband to work.
Also, thanks for sharing it <3